Volume 30, Issue 6
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Features
The Dover and Calais Tunnel
Importance of Advertising
Is Vitality Vital?
The Siamese Twins
Scientific and Practical Information - February 7, 1874
The Vulcanization of Hydrocarbon Compounds
The New England Association of Inventors and Patent Owners
The Turner Car Brake—Application for an Extension
The One Hundred Thousand Dollar Canal Reward
The Philosophy of the Sand Blast
Professor Coffin
Utilization of Copper Scraps in Electro Plating
New English Thrashing Machines - February 7, 1874
Astronomical Notes - February 7, 1874
Professor Agassiz on the Darwinian Theory-- Interesting Facsimile Letter from the Great Naturalist
Patent Barrel Head
Physician's Cane
The Toselli Torpedo
Fire and Waterproof Chimney Guard
Professor Proctor's Astronomical Lectures
Decisions of the Courts - February 7, 1874
United States Circuit Court—Southern District or New York.Harvester Patent.—C. Aultman vs. H. C. Holley And E. H. Fittz.[In Equity—Before Woodruff, Judge.]
Recent American and Foreign Patents - February 7, 1874
Patent Office Decisions - February 7, 1874
Answers Correspondents - February 7, 1874
Communications Received - February 7, 1874
Canadian Patents - February 7, 1874
List of Patents Granted in Canada, January 13 to January 20. 1873